Phonograph, graphophone, &amp;c.



No. 861,827. PATENTED JULY 30, 1907.

' G. G. GARRARD.

PHONOG'RAPH, GRAPHOPHONB, 8:0.

I APPLICATION FILED F153. 1, 1907.

r/vws wmvrok. w Q Q UNITED STATES PATENT cur os.

CHARLES GEORGE GARRARD, OF LONDON, ENGLAND, ASSIGNOR TO EDISON-BELL CON- SOLIDATED PHONOGRAPH COMPANY LIMITED, OF LONDON, ENGLAND.

PHONOGRAPH, GRAPHOPHONE, &c.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed February 1,1907. Serial No. 355,295.

To all whom it may concern:

Be it known that I, CHARLES GEORGE GARRARD, a subject of His Majesty the King of Great Britain, ren siding at London, England, have invented a certain new and useful Improvement inPhonographs, Graphophones, and the Like, of which the following is a specification. This invention relates to phonographs, graphophones and the like and particularly to the driving mechanism thereof with the object of effecting certain improvements therein. i It has T itherto been the practice to traverse the stylus upon the blank or record by providing the arm which carries said stylus with a half nut adapted to engage the feeding screw, whereby the revolution of the latter causes the half nut to travel from end to end thereof in the well known manner. The employment of a half nut however is found to be objectionable on account of the excessive amount of friction set up between it and the feeding screw, and the object of the present invention is to substitute for the half nut a revoluble device which will engage the threads of the positively driven feeding screw and revolve while traveling thereover thereby lessening the friction between the two parts. A convenient means for effecting this purpose is to mount in any convenient position upon the stylus-carrying arm and by any suitable means a revoluble disk or disks having its, or their,v peripheral edge, or edges, shaped or formed so as to engage readily with the threads upon the feeding "screw, whereby when the latter is revolved the diskor disks will also revolve and at the same time travel lengthwise of the feeding screw carrying the arm and stylus with it in the well understood manner. In place of the disk or disks, a roller having one or more grooves of a pitch corresponding tothat of the screw, may be used, or any other revoluble attachment to the arm may be employed having a like pur pose and effect. 40 In the accompanying drawingsz-Figure 1 is an end elevation of so much of a phonograph as is necessary to illustrate the present invention, and Fig. 2 is a dctached vi ew of one form of revoluble device adapted to engage with the feeding screw.

In said drawings 1 is the plain shalt pivotally carry- 4o ing the stylus arm 2 on which is the usual diaphragm 3 carrying the stylus While 4 is the positively driven feeding screw with. which is adapted to engage a pair of disks 5 rotatably mounted on arm 6 which is secured to arm 2. As seen a pair of disks are employed but it is obvious that a single or several disks may be employed or a roller havingone or more grooves of a pitch corresponding to --the thread of the leading screw may be equally well employed.

What is claimed is 1. In phonogrnphs, grnphophones and the like. the cone hinntion of a positively driven fcedingscrew, :1 styluscarryinp; arm to be moved by said feedingscrew. and :1 disk rotatably mounted upon said arm and adapted to be engaged with and rotated by so id feeding-screw during the feeding operation.

' 2. [n.phonogrnphs, graphopliones and the like, the combination 0t :1 positively driven feeding-screw, a styluscarrying arm pivotally mounted adjacent to said feedingscrew, and a revoluble device carried by said arm adaptand rotated by said feeding-screw to move said arm in one direction, and to be disengaged from'said feeding screw, whereby said arm may be returned to its starting position. 7

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

CHARLES GEORGE GARRARD. i

Witnesses I'nner Winms, FnEnnIcn \VILLIAM ILmisnnfils. 

